中国生态农业学报（中英文）2025，Vol.33Issue(5)：902-912,11.DOI:10.12357/cjea.20240581
不同类型养殖粪水施用对青贮玉米种植土壤肥力、氮素平衡和经济效益的影响
Impact of application of different types of livestock wastewater on soil fertility,nitrogen balance,and economic benefits of silage corn
摘要
Abstract
The treatment and utilization of livestock wastewater are major challenges in promoting green and sustainable develop-ment of the livestock industry in China.The degree of treatment of livestock wastewater,as it transitions from standard discharge to resource utilization,has a substantial impact on its nutrient characteristics.However,the effects of different types of livestock wastewater on crop yield and the economic benefits of their application are not yet fully understood.In this study,various types of livestock wastewater produced at different stages of the treatment process during intensive dairy farming operations were selected.We investigated the effects of mixture of manure and urine,digestated pulp,AO(anoxic-oxic)process effluent,and liquid digestate from oxidation pond,as well as the effects of different application rates(50％nitrogen substitution,100％nitrogen substitution,and irrigation with no nitrogen substitution)on crop yield,soil fertility,and economic returns.The results indicated that T2 and T3 treat-ments applying livestock wastewater at a 50％nitrogen substitution rate could increase crop yield by an average of 12.24％,whereas the 100％nitrogen substitution treatments posed a risk of yield reduction.Among these,the highest crop yield was observed with a 50％nitrogen equivalent substitution with AO process effluent,suggesting that the partial substitution of chemical nitrogen fertilizer with livestock wastewater can enhance crop productivity under certain conditions.The application of a mixture of manure and urine had a significant positive effect on soil fertility,particularly in terms of increasing the contents of soil total nitrogen and organic matter.Under the 100％nitrogen substitution treatments,soil total nitrogen and organic matter levels were generally higher than those in the 50％substitution treatments.This suggests that 100％nitrogen substitution using livestock wastewater contributes substantially to soil enrichment and can support sustainable soil health over time.In terms of economic costs,applying livestock wastewater at a 50％nitrogen substitution rate incurred a cost of approximately 12.5 to 13.5 ¥·t-1,whereas the 100％nitrogen substitution treatments were more economical,with costs ranging from 5.0 to 7.0 ¥·t-1.However,when considering both crop yield and the market price of agri-cultural products,the 50％nitrogen equivalent substitution treatment with digestated pulp produced the best economic returns,reach-ing up to 38.3 ¥·t-1.Thus,from an economic perspective,a 50％nitrogen substitution treatment with digestated pulp is the optimal strategy for field applications.This approach balances the benefits of improved crop yield,enhanced soil fertility,and maximized eco-nomic gain,making it a promising method for sustainable agricultural development.关键词
集约化养殖/粪水还田/土壤肥力/作物产量/经济效益Key words
intensive farming/livestock wastewater application to fields/soil fertility/crop yield/economic benefits分类
环境科学引用本文复制引用
刘泽龙,薄玉琨,赵英俊,张云颖,任亚展,王选,张晓航,杨晶..不同类型养殖粪水施用对青贮玉米种植土壤肥力、氮素平衡和经济效益的影响[J].中国生态农业学报（中英文）,2025,33(5):902-912,11.基金项目
国家重点研发计划项目(2021YFD1901003)、河北省重点研发计划项目(22326802D,22324002D)和河北省土壤生态学重点实验室建设补助经费项目(226790207H)资助 This study was supported by the National Key Research and Development Program of China(2021YFD1901003),Key R&D Project of Hebei Province(22326802D,22324002D),and Hebei Province Key Laboratory of Soil Ecology Construction Subsidy Project(226790207H). （2021YFD1901003）
